2014MNRAS.442..891C

Query : 2014MNRAS.442..891C

2014MNRAS.442..891C - Mon. Not. R. Astron. Soc., 442, 891-899 (2014/July-3)

Ultracompact dwarfs around NGC 3268.

CASO J.P., BASSINO L.P., RICHTLER T., CALDERON J.P. and SMITH CASTELLI A.V.

Abstract (from CDS):

We present radial velocities (from Gemini/GMOS) of the second sample of ultracompact dwarfs (UCDs) and bright globular clusters (GCs) in the Antlia cluster. 23 objects are located around the giant elliptical NGC 3268, and one is close to the fainter lenticular NGC 3273. Together with previously found UCDs around NGC 3258, a total of 35 UCDs and bright GCs has been now identified in the Antlia cluster. Their colours and magnitudes are compared with those of the nuclei of dE,N galaxies already confirmed as Antlia members. For a subsample that lie on ACS (Advanced Camera for Surveys) images and are brighter than MV = -9 mag, the effective radii (Reff) have been measured, the maximum radius being approximately 10 pc. In addition to the radial velocity sample, we find 10 objects in the magnitude range corresponding to GCs but with 10 < Reff < 17 pc, resembling the so-called extended clusters. By number and magnitude, the new UCDs fit to the GC luminosity function, supporting their interpretation as bright GCs. Additionally, we use a tracer mass estimator to calculate the mass enclosed up to ~47 kpc from NGC 3268, which results in 2.7x1012M☉.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): galaxies: dwarf - galaxies: nuclei - galaxies: photometry

Nomenclature: Table 1: [CBR2013] ACO NN (Nos 12-35) added. Table 2: [CBR2014] JHHMMSS.ss+DDMMSS.ss N=9.

Simbad objects: 43

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Number of rows : 43
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 2029 0
2 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1529 0
3 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
4 [CBR2014] J102847.24-353537.27 Gl? 10 28 47.240 -35 35 37.27           ~ 1 0
5 [CBR2014] J102849.06-353526.44 Gl? 10 28 49.060 -35 35 26.44           ~ 1 0
6 [CBR2014] J102851.94-353458.02 Gl? 10 28 51.940 -35 34 58.02           ~ 1 0
7 [CBR2014] J102852.49-353556.54 Gl? 10 28 52.490 -35 35 56.54           ~ 1 0
8 NGC 3258 EmG 10 28 53.588 -35 36 19.98   12.50 11.72 10.86   ~ 200 0
9 [CBR2014] J102855.40-353623.43 Gl? 10 28 55.400 -35 36 23.43           ~ 1 0
10 [CBR2014] J102855.94-353631.71 Gl? 10 28 55.940 -35 36 31.71           ~ 1 0
11 [CBR2014] J102856.64-353608.81 Gl? 10 28 56.640 -35 36 08.81           ~ 1 0
12 ACO S 636 ClG 10 29 41.0957 -35 19 32.908           ~ 248 0
13 [CBR2013] ACO 12 G 10 29 49.3440 -35 17 40.128           ~ 1 0
14 [CBR2013] ACO 13 G 10 29 52.5840 -35 19 20.532           ~ 1 0
15 [CBR2013] ACO 14 G 10 29 54.4200 -35 17 47.472           ~ 1 0
16 [CBR2013] ACO 15 G 10 29 54.8880 -35 18 45.036           ~ 1 0
17 [CBR2013] ACO 16 G 10 29 57.2280 -35 19 28.416           ~ 1 0
18 [CBR2013] ACO 17 G 10 29 58.704 -35 21 04.86           ~ 1 0
19 [CBR2014] J102958.87-351902.54 Gl? 10 29 58.870 -35 19 02.54           ~ 1 0
20 [CBR2013] ACO 18 G 10 29 58.9200 -35 24 08.028           ~ 1 0
21 [CBR2013] ACO 19 G 10 29 59.3160 -35 18 51.984           ~ 1 0
22 NGC 3268 EmG 10 30 00.6490581240 -35 19 31.519591284   12.57 11.77 10.68   ~ 163 0
23 [CBR2013] ACO 20 G 10 30 00.8280 -35 20 20.076           ~ 1 0
24 [CBR2013] ACO 21 G 10 30 01.7640 -35 20 15.936           ~ 1 0
25 [CBR2013] ACO 22 G 10 30 01.836 -35 21 21.60           ~ 1 0
26 [CBR2013] ACO 23 G 10 30 01.9080 -35 20 59.352           ~ 1 0
27 [CBR2013] ACO 24 G 10 30 02.988 -35 19 10.02           ~ 1 0
28 [CBR2013] ACO 25 G 10 30 03.1320 -35 20 11.184           ~ 1 0
29 [CBR2013] ACO 26 G 10 30 04.2120 -35 16 18.048           ~ 1 0
30 [CBR2013] ACO 27 G 10 30 04.3560 -35 20 27.564           ~ 1 0
31 [CBR2013] ACO 28 G 10 30 04.6800 -35 20 02.868           ~ 1 0
32 [CBR2013] ACO 29 G 10 30 05.4360 -35 21 15.624           ~ 1 0
33 [CBR2013] ACO 30 G 10 30 07.6320 -35 20 51.432           ~ 1 0
34 [CBR2013] ACO 31 G 10 30 07.8840 -35 16 48.144           ~ 1 0
35 [CBR2013] ACO 32 G 10 30 08.1360 -35 22 40.512           ~ 1 0
36 [CBR2013] ACO 33 G 10 30 09.8280 -35 17 57.768           ~ 1 0
37 [CBR2014] J103010.22-351942.66 Gl? 10 30 10.220 -35 19 42.66           ~ 1 0
38 NGC 3273 GiG 10 30 29.1806574792 -35 36 38.199704832   13.50 12.93 11.89   ~ 52 0
39 [CBR2013] ACO 34 G 10 30 30.4920 -35 13 02.604           ~ 1 0
40 [CBR2013] ACO 35 G 10 30 30.5110 -35 36 45.828           ~ 1 0
41 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
42 NGC 4636 LIN 12 42 49.8333280080 +02 41 15.951929028   12.62 11.84     ~ 1156 1
43 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0

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